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  <title>Retrieve the underlaying resource</title>
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  <div id="layout-content"><div id="streamwrapper.stream-cast" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">streamWrapper::stream_cast</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">streamWrapper::stream_cast</span> &mdash; <span class="dc-title">Retrieve the underlaying resource</span></p>

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 <div class="refsect1 description" id="refsect1-streamwrapper.stream-cast-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>streamWrapper::stream_cast</strong></span>(<span class="methodparam"><span class="type">int</span> <code class="parameter">$cast_as</code></span>): <span class="type">resource</span></div>

  <p class="para rdfs-comment">
   This method is called in response to <span class="function"><a href="function.stream-select.html" class="function">stream_select()</a></span>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-streamwrapper.stream-cast-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">cast_as</code></dt>

     <dd>

      <p class="para">
       Can be <strong><code>STREAM_CAST_FOR_SELECT</code></strong> when
       <span class="function"><a href="function.stream-select.html" class="function">stream_select()</a></span> is calling
       <span class="function"><strong>stream_cast()</strong></span> or
       <strong><code>STREAM_CAST_AS_STREAM</code></strong> when
       <span class="function"><strong>stream_cast()</strong></span> is called for other uses.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-streamwrapper.stream-cast-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Should return the underlying stream resource used by the wrapper, or <strong><code>false</code></strong>.
  </p>
 </div>




 <div class="refsect1 seealso" id="refsect1-streamwrapper.stream-cast-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.stream-select.html" class="function" rel="rdfs-seeAlso">stream_select()</a> - Runs the equivalent of the select() system call on the given
   arrays of streams with a timeout specified by seconds and microseconds</span></li>
   </ul>
  </p>
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